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I'm trying to add complications to an existing app via the directions of https://developer.apple.com/documentation/clockkit/deprecated_articles_and_symbols/creating_complications_for_your_watchos_app/enabling_complications_for_your_watchos_app however, Xcode 15 does not have "Complications Configuration" in the Project menu so I can't put in the correct info for "Data Source Class" and "Complications Group". Can someone direct me where to go for up to date information regarding how to do this in Xcode 15?

I have an iOS phone educational sports app. There is one small section where the user can track their stats. It is a very minor part of the app (perhaps 1% of the app content). It would be perfect for a watchOS app on its own. Can I create a separate standalone watch app even when the content is included in my phone app when it is a very insignificant part of the iPhone app?